However, it was not clear why the Indian was not executed while four other convicts were put to death by the firing squad.

48-year-old Singh was among 10 convicts who were to be executed but were not put to death.

He was found guilty by an Indonesian court of trying to smuggle in 300 grams of heroin and was handed death penalty in 2005.

MEA Spokesperson Vikas Swarup had yesterday said that Indian Embassy officials in Jakarta were reaching out to the Indonesian foreign office and the senior leadership of the country on the issue.

Swaraj had said government was making last minute efforts to save Singh

"Afdhal Muhammad, the legal representative of Singh was of the view that he can file for Presidential clemency under the relevant law before the President of Indonesia. The Embassy sent a Note Verbale to Indonesia's Foreign Ministry requesting that all legal recourse should be exhausted before the death penalty is carried out," Swarup said.

Singh, who hails from Jalandhar in Punjab, is among 14 people who were facing execution after the authorities decided to resume implementing death penalty. The decision has been criticised by human rights organisations.

The 14 convicts to be executed included persons from Indonesia, Nigeria, Zimbabwe and Pakistan.

Singh was arrested on August 29, 2004, at the Soekarno Hatta Airport on charges of drug trafficking. The Tangerang Court awarded him capital punishment in February 2005, against the prosecutors' request for 20 years imprisonment.

His appeal against the death penalty was turned down by the High Court of Banten in May, 2005. He then appealed to the Supreme Court which also upheld his death penalty. He is presently detained at Nusakambangan Pasir Putih, Cilacap.